Only company in the world who is authorized to work on and service the Ford GT supercar transmission

Only company in the world to achieve CARB legality when tuning a forced induction application through a factory NISSAN ECU

We Know Cars

From our sales and customer service team, who are enthusiast themselves, to our in-house research and development team to our in-house installation center we are constantly testing and developing new products and working with other industry manufacturers to improve their products. These resources allow our Customer Support teams to be the most highly experienced team around.

Racing Heritage

STILLEN's founder, Steve Millen, enjoyed a wildly successful, multi-decade racing career in which he earned several titles including:

2 time IMSA world champion

2 time Mickey Thompson off-road champion

24 hours of Le Mans class winner

24 hours of Daytona overall winner

12 hours of Sebring overall winner

Winningest driver in IMSA GT history

Today, you can find Steve within the STILLEN campus overseeing new product development, checking in on the progress of installs being done in the service shop, discussing which new vendors to offer our customers and more.

Made in the USA

We design and manufacturer all STILLEN parts in our Southern California based campus, which consists of several warehouses and manufacturing plants that span over 100,000 sq. ft. and allow us to manufacture CNC machined, fabricated tube and sheet metal, and carbon fiber products in-house. To see our capabilities for yourself, stop by for a tour the next time you're in the Southern California area!

Choose from Thousands of Parts

STILLEN manufacturers thousands of products across a variety of vehicle platforms and works with hundreds of vendors to bring you the best selection of parts for your vehicle.

Low Price Guarantee

Bring us any advertised price for a product that we carry and we'll do our best to beat it. We believe that our customers deserve the best price possible for the products they buy, so our team is dedicated to giving you the best possible deal. Always make STILLEN your last stop for maximum savings and excellent customer service.

YOUR VEHICLE

Airaid EconoAid Throttle Body Booster

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From: $29.99

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Overview

ECONOAID Throttle Body Booster Spins the incoming air as it passes through your throttle body and over the multitude of ECONOAID blades. The turbulent air charge is carried through past intake valves for better atomization and more complete combustion! The ECONOAID® Throttle Body Booster will give you a crisper throttle response, along with better gas mileage. A huge benefit of the Econoaid is the fuel savings. The Results of this fuel saving device will always vary depending on vehicle type, driving habits, age of the vehicle, and driving environment, among other factors. However, from the reports of our customers, the average vehicle will see an extra 1-3 MPG and produce an extra 6-10 Ft.lbs of Torque, which can be felt from the increased low-end throttle response. The Econoaid Throttle Body Booster will pay for itself in no time at all, especially with current increasing gas prices.

Manufacturer

Build it better. That's the American ingenuity behind many of today's successes in the automotive aftermarket industry and the story behind AIRAID